Lots of discussion on internet forums. They're making two versions. The "Dutch" version has a heavy barrel with an open flash suppressor and brown furniture; the "Portuguese" model has a lightweight barrel (1 lb. lighter) with a closed flash suppressor and black furniture. $1,700 or $1,600, respectively.

These only resemble the original AR-10's. They are not exact copies. The biggest point of discontent seems to revolve around the front sight base. Brownell's is using a modified AR-15 front sight base, which has a much less steep angle to it than the original AR-10's. Doesn't look correct at all when you see an original and Brownell's version side by side.